64641113216 has 32 divisors (see below), whose sum is σ = 133217819100. Its totient is φ = 31206052864.

The previous prime is 64641113177. The next prime is 64641113239. The reversal of 64641113216 is 61231114646.

It can be written as a sum of positive squares in 2 ways, for example, as 62800360000 + 1840753216 = 250600^2 + 42904^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8703335 + ... + 8710758.

Almost surely, 2^64641113216 is an apocalyptic number.

It is an amenable number.

64641113216 is an abundant number, since it is smaller than the sum of its proper divisors (68576705884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64641113216 is a wasteful number, since it uses less digits than its factorization.

64641113216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17414136 (or 17414124 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The spelling of 64641113216 in words is "sixty-four billion, six hundred forty-one million, one hundred thirteen thousand, two hundred sixteen".